Backward-curved stainless steel centrifugal fans are indispensable equipment in modern daily life. In deep well operations, such fans gradually eliminate hazardous gases, providing safety guarantees for workers’ operations. At present, backward-curved stainless steel centrifugal fans are widely applied in industries including metallurgy, coal mining, electric power and chemical engineering. The application of backward-curved stainless steel centrifugal fans effectively safeguards both industrial production and daily life, making them vital engineering equipment. The core operating component of a backward-curved stainless steel centrifugal fan is its rotor, which drives gas movement to realize air circulation — this is the operating principle of centrifugal fans.
Start-up is a mandatory working procedure for all engineering equipment, and backward-curved stainless steel centrifugal fans are no exception. During the fan start-up process, it is necessary to verify whether the starting power supplied by the motor can meet the driving requirement of the rotor. For this purpose, the no-load start-up time of the motor rotor shall be calculated first. Parameters including motor model, rated power and rated rotating speed can be acquired from the motor nameplate, while the rotational mass of the backward-curved stainless steel centrifugal fan can be obtained from the fan nameplate. Combined with the rotor diameter, blade outlet diameter and blade inlet diameter, the flywheel torque of the backward-curved stainless steel centrifugal fan impeller can be calculated using the fan impeller torque formula. By comparing this value with the output torque of the starting motor, the loaded start-up time of the backward-curved stainless steel centrifugal fan impeller can be determined. In this way, the start-up process of the backward-curved stainless steel centrifugal fan rotor can be preliminarily quantified. Proper operation of backward-curved stainless steel centrifugal fans is of great significance: it can not only enable the fans to achieve expected service performance, but also greatly extend their service life.
